<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" lang="zh" xml:lang="zh">
<head>
<META http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>概念: 阶段 </title>
<meta content="Concept" name="uma.type">
<meta content="phase" name="uma.name">
<meta content="阶段 " name="uma.presentationName">
<meta name="element_type" content="concept">
<meta content="description" name="filetype">
<meta name="role" content="">
<link type="text/css" href="./../../../css/default.css" rel="StyleSheet">
<script language="JavaScript" type="text/javascript" src="./../../../scripts/ContentPageResource.js"></script><script language="JavaScript" type="text/javascript" src="./../../../scripts/ContentPageSection.js"></script><script language="JavaScript" type="text/javascript" src="./../../../scripts/ContentPageSubSection.js"></script><script language="JavaScript" type="text/javascript" src="./../../../scripts/ContentPageToolbar.js"></script><script language="JavaScript" type="text/javascript" src="./../../../scripts/contentPage.js"></script><script language="JavaScript" type="text/javascript">
					var backPath = './../../../';
					var imgPath = './../../../images/';
					var nodeInfo=[{view: "view:_FCx1oN7CEdmsEI4YDGX2ag", path: ["_FCx1oN7CEdmsEI4YDGX2ag", "_jD8dUAIbEdqEutyfYo0quQ", "_vzRNgDIcEdqDs_9ORT1Rig", "__7xOEC7aEdqHMdmRzC0-2g"]}];
					contentPage.preload(imgPath, backPath, nodeInfo,  '', false, false, false);
				</script>
</head>
<body>
<div id="breadcrumbs"></div>
<table width="100%" cellspacing="0" cellpadding="0" border="0">
<tr>
<td valign="top"><a name="Top"></a>
<div id="page-guid" value="__7xOEC7aEdqHMdmRzC0-2g"></div>
<table width="100%" cellpadding="0" cellspacing="0" border="0">
<tr>
<td nowrap="true" class="pageTitle">概念：阶段 </td><td width="100%">
<div id="contentPageToolbar" align="right"></div>
</td>
</tr>
</table>
<table cellspacing="0" cellpadding="0" border="0" width="100%">
<tr>
<td class="pageTitleSeparator"><img height="1" title="" alt="" src="./../../../images/shim.gif"></td>
</tr>
</table>
<div class="overview">
<table cellpadding="0" cellspacing="0" border="0" width="97%">
<tr>
<td width="50"><img title="" alt="" src="./../../../images/concept.gif"></td><td>
<table cellpadding="0" cellspacing="0" border="0" class="overviewTable">
<tr>
<td valign="top">此指导信息引入了阶段的概念以及阶段在项目中的用途。</td>
</tr>
</table>
</td>
</tr>
</table>
</div>
<div class="sectionHeading">主要描述</div>
<div class="sectionContent">
<table cellpadding="0" cellspacing="0" border="0" class="sectionTable">
<tr valign="top">
<td class="sectionTableSingleCell"><h3>
    什么是阶段？
</h3>
<p>
    项目的总目的是生产产品，而负责项目的团队的特定目标在整个项目过程中会有很大变化。在开始时，产品的需求通常范围很广。而且，人们不是总能够清楚项目是否切实可行，或甚至项目是否能够产生利润。此时，得出这些问题的答案将非常重要，并且对于真正意义上的开始开发产品也非常重要。相似地，当产品开发快要结束时，产品本身通常已完成，这时将着重考虑质量、交付和完整性问题。<a class="elementLinkWithUserText" href="./../../../core.base_concepts/guidances/concepts/task_86A4917F.html" guid="7.624729048911575E-305">任务</a>以新的方式执行。<a class="elementLinkWithUserText" href="./../../../core.base_concepts/guidances/concepts/work_product_18CEEF8D.html" guid="4.804531471620803E-306">工作产品</a>将具有新内容。
</p>
<p>
    要在<a class="elementLinkWithUserText" href="./../../../core.base_concepts/guidances/concepts/delivery_process_CFEBBC78.html" guid="_EhgqwO8MEdmKSqa_gSYthg">交付流程</a>的定义中考虑这些基本观察，UMA 建议以阶段顺序划分流程。每个阶段有自己的目标和自己的迭代样式，并且每个阶段通常单独定制自己的任务和工作产品。
</p>
<h3>
    &nbsp;<a id="Iteration and phases" name="Iteration and phases">迭代和阶段</a>
</h3>
<p>
    每个阶段可进一步细分为迭代。迭代是完整的开发循环，生成的是可执行系统的发行版（内部或外部），这通常是开发中的最终产品的一部分，会通过一次次的迭代逐渐发展为交付的产品。下图提供各个阶段和迭代中的项目分解示例
</p>
<p align="center">
    <img height="128" alt="Rational Unified Process 中的阶段和迭代示例" src="./../../../core.base_concepts/guidances/concepts/resources/im_prar6.gif" width="382" border="0" />
</p>
<p class="picturetext" align="center">
    RUP 中的阶段和迭代示例
</p>
<p>
    阶段结束时产生的发行版（主要发行版）要比那些仅仅为一个迭代生产的发行版（次要发行版）更重要。
</p></td>
</tr>
</table>
</div>
<table cellpadding="0" cellspacing="0" border="0" class="copyright">
<tr>
<td class="copyright"><p>
    &copy; &nbsp;Copyright IBM Corp.&nbsp;1987, 2005&nbsp;All Rights Reserved
</p></td>
</tr>
</table>
</td>
</tr>
</table>
</body>
<script language="JavaScript" type="text/javascript">
				contentPage.onload();
			</script>
</html>
